The difference between dolomite and calcium carbonate in a glaze

Wednesday 5th March 2014

These glaze cones are fired at cone 6 and have the same recipe: 20 Frit 3134, 21 EP Kaolin, 27 calcium carbonate, 32 silica. The difference: The one on the left uses dolomite instead of calcium carbonate. Notice how the MgO from the dolomite completely mattes the surface whereas the CaO from the calcium carbonate produces a brilliant gloss.

Pages that reference this post in the Digitalfire Reference Database:

Gerstley Borate, Calcium Carbonate, Dolomite, MgO, CaO, Dolomite Matte

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